Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Experimental investigation of three-dimensional bubbly two-phase pipe flows
Neumann, M.ORC; Hampel, U.ORC
Modelling gas-liquid two-phase flow is a topic of constant relevance in nuclear thermal hydraulics. Gas-disperse two-phase flows occur in e.g. fuel elements in the reactor core, in pipes and components during pressure loss, sudden reflooding or other events. Due to the deformable gas-liquid interface and the complexity of heat, mass and momentum transfer across the interface, gas-liquid two-phase flow is very difficult to model and simulate. On the device scale it is common to use Euler/Euler multi-fluid approaches for CFD simulations, which require a good number of empirical correlations as closure models. Such models are commonly derived from experiments. Validation of the correctness of predictive simulations then also requires experiments, which must be simplified to a degree to allow provision of CFD-grade experimental data but complex enough to resemble real flow situations. The latter calls especially for investigations on flow fields in more complex three-dimensional domains, which are prototypical for e.g. bends, valves, T-junctions and rod bundles.
Keywords: ultrafast x-ray CT, two-phas flow, three-dimensional flow, obstacle
  • Lecture (Conference)
    East German Centre of Competence in Nuclear Technology Workshop of Doctoral Candidates, 13.12.2018, Zittau, Deutschland

Publ.-Id: 29601 - Permalink